@article{MAN_1930__103_159443,
     author = {E. Hopf},
     title = {Zwei {S\"atze} \"uber den wahrscheinlichen {Verlauf} der {Bewegungen} dynamischer {Systeme}},
     journal = {Mathematische Annalen},
     pages = {710--719},
     publisher = {mathdoc},
     volume = {103},
     year = {1930},
     zbl = {56.0703.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1930__103_159443/}
}